i cant get on smp 9 ??? NEED HELP

heywell today 11 November 2012 I was on smp9 me and this other player were about to go and kill a wither boss but just as we were getting prepared all of us got kicked I tried to rejoin but i keep getting this message "connection lost Internal exception: java.io.IOException: Bad packet id 209" iv'e tried everything like restarting minecraft and restarting my pc but nothing works i can join other servers like smp1,2,3 ect if any1 can help please doKrazy_kai

Just search in the search bar in the upper right hand corner. Basically someone on the server is logging in and the server doesn't want it to log in so the server kicks everyone out. Every time the person logs in the server kicks everyone (in town).

Just search in the search bar in the upper right hand corner. Basically someone on the server is logging in and the server doesn't want it to log in so the server kicks everyone out. Every time the person logs in the server kicks everyone (in town).